We're inspecting the replaced PHI node after releasing it.
Bootstrapped and tested on x86-64-unknown-linux-gnu, pushed.
PR tree-optimization/114624
* tree-scalar-evolution.cc (final_value_replacement_loop):
Get at the PHI arg location before releasing the PHI node.
* gcc.dg/torture/pr114624.c: New testcase.
---
gcc/testsuite/gcc.dg/torture/pr114624.c | 20 ++++++++++++++++++++
gcc/tree-scalar-evolution.cc | 4 ++--
2 files changed, 22 insertions(+), 2 deletions(-)
create mode 100644 gcc/testsuite/gcc.dg/torture/pr114624.c
diff --git a/gcc/testsuite/gcc.dg/torture/pr114624.c
b/gcc/testsuite/gcc.dg/torture/pr114624.c
new file mode 100644
index 00000000000..ae031356982
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr114624.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+
+int a, b;
+int main() {
+ int c, d = 1;
+ while (a) {
+ while (b)
+ if (d)
+ while (a)
+ ;
+ for (; b < 2; b++)
+ if (b)
+ for (c = 0; c < 8; c++)
+ d = 0;
+ else
+ for (a = 0; a < 2; a++)
+ ;
+ }
+ return 0;
+}
diff --git a/gcc/tree-scalar-evolution.cc b/gcc/tree-scalar-evolution.cc
index 25e3130e2f1..b0a5e09a77c 100644
--- a/gcc/tree-scalar-evolution.cc
+++ b/gcc/tree-scalar-evolution.cc
@@ -3877,6 +3877,7 @@ final_value_replacement_loop (class loop *loop)
to a GIMPLE sequence or to a statement list (keeping this a
GENERIC interface). */
def = unshare_expr (def);
+ auto loc = gimple_phi_arg_location (phi, exit->dest_idx);
remove_phi_node (&psi, false);
/* Propagate constants immediately, but leave an unused initialization
@@ -3888,8 +3889,7 @@ final_value_replacement_loop (class loop *loop)
gimple_seq stmts;
def = force_gimple_operand (def, &stmts, false, NULL_TREE);
gassign *ass = gimple_build_assign (rslt, def);
- gimple_set_location (ass,
- gimple_phi_arg_location (phi, exit->dest_idx));
+ gimple_set_location (ass, loc);
gimple_seq_add_stmt (&stmts, ass);
/* If def's type has undefined overflow and there were folded
--
2.35.3
